Bad weather has forced rescuers to wait until Friday to try to reach a small plane believed to have crashed in an Antarctic mountain range while carrying three Canadians between scientific research stations on the continent.

The plane was flying from a US station near the South Pole to an Italian research base in Terra Nova Bay. Its emergency locator started transmitting about 10 pm Wednesday in the Queen Alexandra mountain range about 450 kilometers (280 miles) north of the pole, halfway to its intended destination. Authorities presume it crashed. (AP)